e T cells became infected with the virus at the same rate as the T cells of the regularly progressing HIV-positive participants. Indeed T cells from the nonprogressors had normal levels of cholesterol. This means that the disruption is unlikely to be due to a problem with the T cells further supporting our conclusion that the slow progression is linked to low cholesterol in the dendri

e T cells became infected with the virus at the same rate as the T cells of the regularly progressing, HIV-positive participants. Indeed, T cells from the nonprogressors had normal levels of cholesterol.

"This means that the disruption is unlikely to be due to a problem with the T cells, further supporting our conclusion that the slow progression is linked to low cholesterol in the dendritic cells and B cells," said Dr. Rappocciolo.

"What is most intriguing is that dendritic cells in the nonprogressors had this protective trait years before they became infected with HIV," Dr. Rinaldo said. "This strongly suggests that the inability of their dendritic cells and B cells to pass HIV to their T cells is a protective trait genetically inherited by a small percentage of people. Understanding how this works could be an important clue in developing new approaches to prevent progression of HIV infection."

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